Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b2352a2a1536c2a…

MALICIOUS

PDF

44.0 KB Created: 2020-10-01 14:54:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: edc7192a4e72c22031b49bfd3bd41feb SHA-1: 409ddccc03052573bb3b4ae931df6c2bbf689995 SHA-256: 7b2352a2a1536c2a91142135e881b9bfb49d8af22b94eb623e22811258cdc5e1
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://cctraff.ru/strik?keyword=lucius+apuleius+pdf In PDF document text
    • http://files.conksbrain.com/uploads/1/3/0/9/130969748/8480953.pdfIn PDF document text
    • http://files.portageresourceguide.com/uploads/1/3/1/6/131606644/8719065.pdfIn PDF document text
    • http://kuxeju.peaceofmindproductsbynatalie.com/uploads/1/3/0/7/130739956/sonij.pdfIn PDF document text
    • http://mejeru.bradyscustomwoodcraft.com/uploads/1/3/0/7/130775195/vutigem_tojufan.pdfIn PDF document text
    • http://files.shannonpoulton.com/uploads/1/3/1/4/131438280/gujupovojel.pdfIn PDF document text
    • https://site-1039280.mozfiles.com/files/1039280/vixopularajazafob.pdfIn PDF document text
    • https://site-1036977.mozfiles.com/files/1036977/40193159759.pdfIn PDF document text
    • https://site-1038790.mozfiles.com/files/1038790/52388042844.pdfIn PDF document text
    • https://site-1036728.mozfiles.com/files/1036728/dizuzo.pdfIn PDF document text
    • https://site-1036995.mozfiles.com/files/1036995/nalidosu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f80c93c-8e4d-4ab1-a0a5-57bab8f1292b/89343294466.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee5339ab-1ca6-4d31-aa0c-fe72605520cd/26762324965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02c1f7cf-b109-42c1-abaf-9d18536d5caf/12333192729.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E73 4992 bytes
SHA-256: 021d8354907ded4b4d804f7876012fc63e0f6ad66ba8b0ae746fc110ac3fe9f5
font_01_sfnt_off00007f8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F8F 10556 bytes
SHA-256: 28bc8e71dda26fbb168e40990277abec28c60956616dabc6f41ce135a125d886